<template>
    <div>
      <!--      面包谢导航区域-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>
      <el-card>
        <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
        </el-alert>
        <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="已完成"></el-step>
        </el-steps>

        <el-form :model="addForm" :rules="addFormRules" ref="addFormRulesRef" label-width="100px" label-position="top">
          <el-tabs :tab-position="'left'"  v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input v-model="addForm.goods_price" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input v-model="addForm.goods_weight"></el-input>
              </el-form-item>
              <el-form-item label="商品熟数量" prop="goods_number">
                <el-input v-model="addForm.goods_number" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                <el-cascader
                  expand-trigger="hover"
                  :options="catelist"
                  v-model="addForm.goods_cat"
                  :props="cateProps"
                  @change="handleChange">
                </el-cascader>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1" >
              <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                <el-checkbox-group v-model="item.attr_vals">
                  <el-checkbox :label="item1" v-for="(item1, i) in item.attr_vals" :key="i" border></el-checkbox>
                </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
              <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
              <el-upload
                :action="uploadURL"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                list-type="picture" :headers="headerObj" :on-success="handleSuccess">
                <el-button size="small" type="primary">点击上传</el-button>
                <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
              <el-button type="primary"  @click="add" style="margin-top: 50px">添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
        </el-form>
      </el-card>
      <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="50%" class="previewImg"
        >
        <img :src="previewPath">
      </el-dialog>
    </div>
</template>

<script>
import _ from 'loadsh'
export default {
  name: 'Add',
  data() {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_cat: [],
        goods_price: 0,
        goods_number: 0,
        goods_weight: '',
        goods_introduce: '',
        pics: [],
        attrs: []
      },
      addFormRules: {
        goods_name: [
          {required: true, message: '请输入商品名称', trigger: 'blur'}
        ],
        goods_price: [
          {required: true, message: '请输入商品价格', trigger: 'blur'}
        ],
        goods_weight: [
          {required: true, message: '请输入商品重量', trigger: 'blur'}
        ],
        goods_number: [
          {required: true, message: '请输入商品数量', trigger: 'blur'}
        ],
        goods_cat: [
          {required: true, message: '请选择商品分类', trigger: 'blur'}
        ]
      },
      catelist: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      manyTableData: [],
      onlyTableData: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  methods: {
    async getCateList () {
      const {data: res} = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类失败')
      this.$message.success('获取商品分类成功')
      this.catelist = res.data
      console.log(this.catelist)
    },
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave(activeName, oldActive) {
      if (oldActive === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabClicked () {
      if (this.activeIndex === '1') {
        const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: 'many'}})
        if (res.meta.status !== 200) return this.$message.error('获取动态参数列表失败')
        this.$message.success('获取动态参数列表成功')
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`, {params: {sel: 'only'}})
        if (res.meta.status !== 200) return this.$message.error('获取动态参数列表失败')
        this.$message.success('获取动态参数列表成功')
        this.onlyTableData = res.data
        console.log(this.onlyTableData)
      }
    },
    // 处理图片预览
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片
    handleRemove(file) {
      const filePath = file.response.data.tem_path
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      this.addForm.pics.splice(i, 1)
    },
    // 监听图片上传成功
    handleSuccess(response) {
      const picInfo = {pic: response.data.tmp_path}
      this.addForm.pics.push(picInfo)
    },
    add: async function () {
      this.$refs.addFormRulesRef.validate(valid => {
        if (!valid) return this.$message.error('请填写必要的表单项')
      })
      const form = _.cloneDeep(this.addForm)
      form.goods_cat = form.goods_cat.join(',')
      this.manyTableData.forEach(item => {
        const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals.join(' ')}
        this.addForm.attrs.push(newInfo)
      })
      this.onlyTableData.forEach(item => {
        const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals}
        this.addForm.attrs.push(newInfo)
      })
      form.attrs = this.addForm.attrs
      const {data: res} = await this.$http.post('goods', form)
      if (res.meta.status !== 201) return this.$message.error('添加商品失败')
      this.$message.success('添加商品成功')
      this.$router.push('/goods')
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  created () {
    this.getCateList()
  }
}
</script>

<style scoped>
.el-checkbox{
  margin: 0 15px 0 0 !important;
}
  .previewImg{
    width: 100%;
  }
</style>
